Yep Looks like DNS propagation.
In lay terms, the whole of the internet hasn't 'noticed' that the site's moved. Some ISPs are faster at copping on than others - Eircom being one of the notoriously slow ones
DNS for me still resolves to the old site too - 212.147.150.18
The DNS is reporting a new IP
Answered from ns9.dnsireland.com (80.93.23.86)
themodelshop.ie. 14400 IN A 217.78.0.167
So I reckon it's Eircom being silly slow buggers as always